package com.linked.gateway.util;

//import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @author :dbq
 * @date : 2022/10/12 15:35
 */
public class IPUtil {
//
//    public static String getIpAddr(HttpServletRequest request) {
//        String ipAddress = null;
//        try {
//            ipAddress = request.getHeader("x-forwarded-for");
//            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//                ipAddress = request.getHeader("Proxy-Client-IP");
//            }
//            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//                ipAddress = request.getHeader("WL-Proxy-Client-IP");
//            }
//            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//                ipAddress = request.getRemoteAddr();
//                if (ipAddress.equals("127.0.0.1")) {
//                    // 根据网卡取本机配置的IP
//                    InetAddress inet = null;
//                    try {
//                        inet = InetAddress.getLocalHost();
//                    } catch (UnknownHostException e) {
//                        e.printStackTrace();
//                    }
//                    ipAddress = inet.getHostAddress();
//                }
//            }
//            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
//            if (ipAddress != null && ipAddress.length() > 15) {
//                // "***.***.***.***".length()
//                // = 15
//                if (ipAddress.indexOf(",") > 0) {
//                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
//                }
//            }
//        } catch (Exception e) {
//            ipAddress = "";
//        }
//        return ipAddress;
//    }
}
